Caffeine affects everyone differently.

Measure your caffeine curve and get personalized timing guidance for sleep, travel, and daily performance.

Caffeine timing is personal

Same caffeine. Different metabolism.

A morning caffeine dose can be nearly gone for one person by afternoon and still lingering for another by bedtime. Cytio measures your caffeine curve so your timing guidance is based on your own biology, not generic advice.

Sleep

See how much caffeine may remain by bedtime.

Performance

Time caffeine around demanding work blocks or fitness routines.

Travel

Adjust caffeine timing when your schedule shifts.

Example caffeine curves

How fast does caffeine fade?

Fast

Mostly faded by 6pm

Average

Some caffeine remains

Slow

More may linger at night

Illustrative curves based on different caffeine half-lives after the same morning dose.

Why personalized caffeine science?

Your caffeine curve is unique, so your timing guidance should be too.

Cytio measures your caffeine curve and turns it into personalized timing guidance for sleep, performance, and travel. No more guessing or relying on averages.

Sleep timing

Keep caffeine from following you to bed.

Your caffeine cutoff should depend on how quickly your levels decline. Cytio helps you plan caffeine timing around your real profile, so less caffeine is likely to linger into the night.

Personal cutoff guidance Bedtime caffeine projections

Example insight

Morning caffeine Mostly useful earlier

Late-day caffeine Higher sleep risk

Personal timing target

Less caffeine lingering by bedtime

Workout window

Before training

Plan caffeine when it is most likely to help you feel ready.

Peak block

Align caffeine timing with your workout, not hours too early or too late.

Recovery

Avoid turning a late boost into a sleep tradeoff.

Fitness timing

Time caffeine for a more energized workout.

Caffeine can support training, but timing matters. Cytio helps you line up caffeine with exercise while accounting for how long it may continue affecting your system afterward.

Workout timing Recovery-aware planning

Work timing

Match caffeine to your focus blocks.

The best caffeine timing is not always “more” or “later.” Cytio helps you plan caffeine around demanding work periods while reducing the chance that it carries too far into the evening.

Focus windows Evening protection

9:00 AM – 12:00 PM

Deep work block

Use timing guidance to support alertness when it matters most.

Afternoon

Decision point

See whether more caffeine fits your profile, schedule, and bedtime.

Evening

Wind down with fewer surprises

Travel plan

Set your destination schedule

Anchor caffeine timing to when you need to be alert and when you need to sleep.

Use your caffeine profile

Adjust timing based on how quickly caffeine levels decline for you.

Reduce avoidable jet lag friction

Coordinate caffeine and sleep timing to support the adjustment period.

Travel timing

Use caffeine more strategically across time zones.

Travel changes the timing problem. Cytio can help you coordinate caffeine and sleep timing around your destination schedule, so you can support alertness without pushing caffeine into the wrong part of the day.

Destination schedule Caffeine + sleep timing

Built on data, not assumptions

Three pillars of personalized caffeine science

Cytio combines direct measurement, clear interpretation, and practical coaching so your daily caffeine decisions are based on your own biology.

Direct metabolic profiling

Capture your real caffeine clearance behavior, rather than relying on averages or assumptions from population data.

Personalized timing guidance

Understand when to consume caffeine for focus and when to stop so less caffeine remains in your system by bedtime.

Trackable optimization

Revisit your profile over time and tune your routine as your training load, stress, and schedule evolve.

How it works

From sample to strategy in three steps

A clear workflow designed for real life. No confusing reports, no generic advice. Just practical next actions for your day.

How It Works

Step 1

Collect your sample

Complete the guided intake flow and submit your sample through our straightforward process.
Step 2

Receive your profile

Review your metabolic result with simple visuals and understandable thresholds.
Step 3

Apply your protocol

Use personalized timing guidance to better align caffeine intake with your goals, schedule, and bedtime.

Personal protocol

Your caffeine protocol, built for your biology

Get a practical, personalized plan for caffeine dose and timing based on how your body actually clears caffeine.

Stay in the loop

Sample report highlights

Clearance speed

Moderate-fast metabolizer

Estimated bedtime caffeine target

< 25mg by 10:00 PM

Recommended cutoff

No caffeine after 12:00 PM

Cytio Caffeine Kinetics app showing personalized caffeine insights based on half-life and caffeine dose, and work, exercise, sleep, and travel.